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Synthesis of pH-degradable polyglycerol-based nanogels by iEDDA-mediated crosslinking for encapsulation of asparaginase using inverse nanoprecipitation
Colloid and Polymer Science ( IF 2.2 ) Pub Date : 2020-06-06 , DOI: 10.1007/s00396-020-04675-8
Alexander Oehrl , Sebastian Schötz , Rainer Haag

Biocompatible, environmentally responsive, and scalable nanocarriers are needed for targeted and triggered delivery of therapeutic proteins. Suitable polymers, preparation methods, and crosslinking chemistries must be considered for nanogel formation. Biocompatible dendritic polyglycerol (dPG) is used in the mild, surfactant-free inverse nanoprecipitation method for nanogel preparation. The biocompatible, fast, and bioorthogonal inverse electron demand Diels-Alder (iEDDA) crosslinking chemistry is used. In this work, the synthesis of pH-degradable nanogels, based on tetrazine, norbonene, and bicyclo[6.1.0]nonyne (BCN) functionalized macromonomers, is reported. The macromonomers are non-toxic up to 2.5 mg mL −1 in three different cell lines. Nanogels are obtained in the size range of 47 to 200 nm and can be degraded within 48 h at pH 4.5 (BA-gels), and pH 3 (THP-gels), respectively. Encapsulation of asparaginase (32 kDa) yield encapsulation efficiencies of up to 93% at 5 wt.% feed. Overall, iEDDA-crosslinked pH-degradable dPG-nanogels from inverse nanoprecipitation are promising candidates for biomedical applications. Graphical Abstract Schematic overview of formed ph-degradable Nanogels through inverse nanoprecipitation. Inverse electron demand Diels-Alder reaction was used as crosslinking method, using a pH-degradable Norbonene-/BCN- and Tetrazine-dPG as macromonomer basis

中文翻译:

通过 iEDDA 介导的交联合成 pH 可降解的聚甘油基纳米凝胶,用于使用反向纳米沉淀包封天冬酰胺酶

治疗性蛋白质的靶向和触发递送需要生物相容性、环境响应性和可扩展的纳米载体。纳米凝胶的形成必须考虑合适的聚合物、制备方法和交联化学物质。生物相容性树枝状聚甘油 (dPG) 用于温和、无表面活性剂的逆纳米沉淀法制备纳米凝胶。使用了生物相容性、快速和生物正交的逆电子需求 Diels-Alder (iEDDA) 交联化学。在这项工作中,报道了基于四嗪、降冰片烯和双环 [6.1.0] 壬炔 (BCN) 功能化大分子单体的 pH 可降解纳米凝胶的合成。在三种不同的细胞系中,大分子单体在高达 2.5 mg mL -1 时是无毒的。纳米凝胶的尺寸范围为 47 至 200 nm,可在 pH 4.5(BA 凝胶)下在 48 小时内降解,和 pH 值 3(THP 凝胶)。天冬酰胺酶 (32 kDa) 的封装在 5 wt.% 饲料中产生高达 93% 的封装效率。总体而言,来自逆纳米沉淀的 iEDDA 交联 pH 可降解 dPG 纳米凝胶是生物医学应用的有希望的候选者。图形摘要 通过反向纳米沉淀形成的 ph 可降解纳米凝胶的示意图概述。使用逆电子需求 Diels-Alder 反应作为交联方法,使用 pH 可降解的降冰片烯-/BCN-和四嗪-dPG 作为大分子单体 图形摘要 通过反向纳米沉淀形成的 ph 可降解纳米凝胶的示意图概述。使用逆电子需求 Diels-Alder 反应作为交联方法,使用 pH 可降解的降冰片烯-/BCN-和四嗪-dPG 作为大分子单体 图形摘要 通过反向纳米沉淀形成的 ph 可降解纳米凝胶的示意图概述。使用逆电子需求 Diels-Alder 反应作为交联方法,使用 pH 可降解的降冰片烯-/BCN-和四嗪-dPG 作为大分子单体
更新日期:2020-06-06
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